Today we have received new information which --- when added to our audio and video evidence, eyewitness testimony, and expert analysis --- definitively establishes that a fighter jet was responsible for this attack. Evidence also suggests that a missile, not a bomb, was used.

There is now conclusive evidence that the explosions at Aleppo University were caused by an airstrike, not a ballistic missile strike and certainly not a car bomb.

Well-placed Western government officials in the region, with access to "technical" information about the strike, have told EA that they "can say with 'certainty' that the missiles were delivered by a jet, flying at altitude".

The officials were specific that their evidence showed that the explosion was not from a ballistic missile fired from the ground or a bomb dropped from the aircraft.